* Canada’s participation in the First World War resulted in the cancellation of the championship from 1916 to 1918.
** The Grey Cup game was also cancelled in 1919 due to a lack of interest from the Interprovincial Rugby Football Union (IRFU) and the intercollegiate unions, along with rules conflicts between the Canadian Rugby Union (CRU) and the western union. Competition finally resumed in 1920 with the 8th Grey Cup game, won 16–3 by the Varsity Blues over the Argonauts.
*** The CRU experimented with a two-game, total points series to determine the champion in 1940.